Pipe-cutter.



No. 782,226. PATENTED FEB. 14, 1905. D. L. ELLIS.

PIPE CUTTER.

APPLICATION FILED JUNE 25, 1904.

2 SHEETS-SHEBT l.

"n Ib.

No. 782,226. PATENTED FEB. I4, 1905.

D. L. ELLIS.

PIPE CUTTER.

APPLICATION FILED JUNE 25, 1904` 2 SHEETS-SHEET 2.

UNITED STATES Patented February 14, 1905.

PATENT OFFICE.

DAVID L. ELLIS, OE GREATEALLS, MONTANA, ASSIGNOR TO ELLIS-FORD PIPE CUTTER COMPANY, OF GREATFALLS, MONTANA.

PIPE-CUTTER.

SPECIFICATION forming part of Letters Patent No. 782,226, dated February 14, 1905.

' Application ined Jun@ z5, 1904. serai No. 214,168.

To all 107mm/ if '1n/r1.7] cm1/c0771.;

Be it known that I, D iviD L.. ELLTs, a citi- Zen ofthe United States, residing' at reatt'alls, in the county otl Cascade and State ot' Montana, have invented new and useful Improvements in Pipe-Cutters, of which the following is a specitication.

My invention is an improved pipe-cutter adapted for use in cutting pipes of various sizes; and it consists in the construction, combination, and arrangement of devices hereinafter described and claimed.

One object of my invention is to etl'ect improvements in the construction ot' the frame in which the screw-operated yoke which tightens and adjusts the cutting-chain is g'uided and held.

A further object is to effect improvements whereby pivotal lost motion ot' the frame is prevented.

A further object is to effect improvements in the construction of the chain which carries certain ot' the cutting-disks.

ln the accompanying' drawings, Figure l is a side elevation, partly in section, of a pipecutter embodying my improvements, showingl the same in operative position on a pipe. Fig. is a transverse sectional view ot` the same, taken on the plane indicated by the line 2 2 ot' Fig. 1. Fig. 3 is adetail elevation, partly in section, in the plane indicated by the line 3 3 of Eig. 1. Fig. 4 is a detail elevation of one ot the yoke or end links. Fig. is a similar view of the other yoke or end link. Fig. 6 is a similar view showing' two ot` the intermediate links of the chain which carries the cutting-disks.

The sides of the frame are each t'ormcd by a pair otl bars Q, spaced apart a suitable distance and secured by rivets 3. Between the innerends of the said pairs of bars are mounted cutting-disks 1 to engage and assist in the cutting ot' the pipe, which is indicated at a in Eig. 1. The pairs of side bars 2 are connected together by inner and outer cross-bars 5 6, respectively, the ends of which are placed between the said side bars and are secured between and to them by the said rivets 3. i

, The voke T comprises a widened central portion 8 and arms 9, which project in opposite directions therefrom and are guided by the pairs of side bars otl the frame and project outwardly beyond them. The widened central portion ot' the yoke forms shoulders 10, which bear against the inner edges ot' the pairs of side bars and prevent endwisc movement of the yoke in either direction in the frame.

A screw 11, which engages a threaded openingl in the center et' the yoke, has a bearing in the outer cross-bai' 6 and is stepped at its inner end in the inner cross-bar 5, as at 12. To the outer end ot the screw is secured a handle 13 or an extension-piece with long handles, l not showin) by means ot' which the screw may be turned to adjust the yoke as may be required to tighten or release the chain which carries certain ot the cutting-disks, the screw also serving' as a lever for use in imparting the required oscillating motion to the trame and chain when cutting a pipe.

The chain comprises a suitable number ot' intermediate links 14, each ot' which has a cutting-disk 15, and a pair of end links 16 17, which serve to connect the intermediate links to the projecting ends ot' the arms of the yoke. Each intermediate link is forked or bit'ul'cated for a suitable distance from one end to provide a pair ot' spaced arms 18, between which t-he disk 15 is mounted at a point substantially midway between the ends ot' the links. At the point where said arms are united each intermediate link is formed with a projecting end tongue 19, which enters the space between the arms of the next adjacent link and is pivotally and detachably connected thereto by means of a suitable bolt having a thumb-nut or other suitable device.

The end link 16 comprises a pair ot' bars or side members 20, secured together and suitably spaced by means ot' shouldered rivets 21, placed at suitable points between the ends thereof. The said link 16 is open at both ends, the tongue 19 of one of the intermediate links being' detachably secured between its side members by a bolt or other suitable device, such as hereinbefore described, the opposite end of said link being detachably and adjustably secured to one arm of the yoke by a similar bolt or device, said link and yoke-arm being provided with suitable openings, as shown, for the reception of said bolt.

The end link 17 is forked, as shown in Fig. 5, and its arms 22 are connected at a point intermediate their ends by a shouldered rivet 23 and are adapted for detachable connection to and adjustment on the other arm of the yoke by a bolt or other suitable device, such as hereinbefore described. The tongue 24, forming one end of said link, is adapted for insertion between the arms of one of the intermediate links and is detachably and pivotally connected thereto by a bolt or other suitable device. By providing a suitable number of the intermediate links to enable the chain to pass around'the pipe, as shown, the cutter may be employed for cutting a pipe of any size.

It will be observed by reference to Fig. l of the drawings and understood from the foregoing description that by the provision of the plurality of cutting-disks 4 with which the inner end of the frame is provided at its sides the frame is prevented from moving pivotally with respect to either of the said disks, and hence lost motion thereof`- and of the chain which carries the other cutting-disks is entirely obviated, thus greatly increasing the eficiency of the cutter.

It will be understood that my improved pipe-cutter may be made of any desired size and that the dimensions of its several parts may be proportioned as required bythe nature of the work to be performed thereby.

Having thus described the invention, I claimm l. A pipe-cutter of the class described, comprising a frame, a chain, connected thereto,

means to tighten and adj ust the chain, cuttingdisks carried by the chain, and cutting-disks carried by the frame and adapted to bear against the pipe at several points to prevent pivotal, lost motion of the frame.

Q. A pipe-cutter of the class described having a Jframe composed of two pairs of side bars, inner and outer cross-bars having their ends inserted between the said side bars, spacing them apart and secured thereto, cutting-disks secured between the inner ends of the said pairs of side bars, to bear on the pipe at several points and thereby prevent pivotal lost motion ofthe frame, a yoke guided between the said pairs of side bars and having a widened, shouldered central portion abutting against the inner edges of the side bars, a screw to adjust the yoke, engaging a threaded opening therein and having its bearings in the inner and outer cross-bars, and a chain having cutting-disks and connected to the ends of the yoke. F

In testimony whereof I aiX my signature in presence of two witnesses.

DAVID L. ELLIS.

Vitnesses:

MICHAEL J OLEARY, RICHARD W. RANDALL. 

